:root {
  color: #111;
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Noto Sans SC", "PingFang HK", "PingFang TC", "PingFang SC", "Microsoft JhengHei", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fff;
}

a {
  color: #111;
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer,
.document {
  width: min(100%, 900px);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid #e8e8e8;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #111;
  font-weight: 700;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.header-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
}

.document-nav,
.language-switcher {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
}

.document-nav a,
.language-switcher a {
  color: #555;
}

.document-nav a[aria-current="page"],
.language-switcher span {
  color: #111;
  font-weight: 600;
}

.language-switcher {
  border-left: 1px solid #dedede;
  padding-left: 18px;
}

.document {
  padding-top: 36px;
  padding-bottom: 48px;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 2em 0 0.75em;
}

h1:first-child,
h2:first-child {
  margin-top: 0;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 22px;
  padding-top: 12px;
}

h3 {
  font-size: 18px;
}

p,
li {
  font-size: 16px;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  padding-left: 1.5em;
  margin: 0 0 1.2em;
}

li + li {
  margin-top: 0.35em;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
  background: #f5f5f5;
  padding: 0.1em 0.3em;
  border-radius: 4px;
}

.link-list,
.language-list {
  list-style: none;
  padding-left: 0;
}

.link-list li,
.language-list li {
  border-top: 1px solid #ededed;
  margin: 0;
}

.link-list a,
.language-list a {
  display: block;
  padding: 14px 0;
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid #e8e8e8;
  color: #555;
  padding-top: 20px;
  padding-bottom: 32px;
}

.site-footer p {
  margin: 0 0 4px;
  font-size: 14px;
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    justify-content: flex-start;
  }

  .document-nav,
  .language-switcher {
    gap: 12px;
  }

  .language-switcher {
    border-left: 0;
    padding-left: 0;
  }

  .document {
    padding-top: 28px;
  }

  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 20px;
  }
}